Challenge accepted: we have an API up and running at tldr.io :) We don't have a gazillion hits everyday for sure, and it may not be as complex as Twitter but:
- It works perfectly
- It really wasn't that difficult to build
If we need to build another product from scratch again though, we'll definitely be faster with nodejs. I understand that nodejs programming seems strange/hard to do in a non-spagetthi way to some people, but really, after a few months it is not hard.